Apparatus for



w. SIHOBRIUGE.

APPABATUS FOR APPLHNG SKILLY T0 #DORE BARS.

APPLICAHON man ocT.1o.191.

1,305,675. Patented June 3, 191i).

4 SHLETSVSHEEI 2.

W. SYROBRIDGE..

APPARATUS FUR APPLYNG SKILLY '(0 CORE BARS. APPUCATION FILSD OCT. 30, 1915,

Patented J une 3, 1919.

4 SHEETS-SHEET 3.

@Mmm/wom ng, n 6

w. `sm0fsrmnsl-R APPARATUS FOR APPLYING SKILLY TD GORE BARS.

APPLICATION FILED OCT. l0; 1915. 4

Patented June 3,1%).

4 SHEETS-SHEET 4 PRATUN UF JERSEY,

Application tiled @ctober l0, 19M.

To ZZ wlw/1t 'it 71mg/ concern Be it known that i, illumini S'rnoinnoan, a citizen of the United States, and a resident ot' lnliverton` in the county of Burlington and .State of New Jersey, have invented a certain new and useiful improvement in Apparatus for Applyii'ig Slrilly to Coreliars, ot' which the following is a true and exact description, reference being' had to the accompanying` drawings,y which form a part thereof.

` Mypresent invention consists in an iinprov'ed means for forming pipe mold cores comprising metallic core bars coated tirst with skilly and then with loam7 or the like. The purpose of the slrilly layer interposed between the metallic core bar proper and the loam coating,r is to provide a layer which will be readily frangible after being; heated7 as it is in the poured inold;1 so that it may be readily broken up in the core bar withdrawal operation and thereby facilitate the longitudinal movement of the core bar out of the molded pipe.

The material known as skilly applied to the 'core bar in a iuid or paint like condition and is thoroughly dried before the loam coating is applied. The skilly coating; becomes exceedingly fragile and readily breaks up, practically in a powderell condition, after being heated to the temperature to which it is subjected when the molds are poured. llhe composition oi' the material known as skilly may vary considerable in practice but its gene 1al nature `will be made clear by the following example ot' a satis-l ."r'actoi'y mixture; namely, one in which the non-liquid ingredients oi the skilly consists of between twentyand thirty parts of each of the following substances: coke screenings, blacking, peat moss and` manure; and between two and three parts of paper and sawdust. To these ingredients suiiicieut water is added to render the mixture Huid and of a paint like consistency. l

The object oi' the present invention is to provide an improved ap'iaratus for applying skilly to core bars easily` eirpeditiojusly-` Iinilorinly and at a comparatively low labor cost. More spe iicallv 'the invention has for its object to provide an apparatus for applydng` slrilly to the core bars ot' a continuously"operating pipe moldingl plant in Specification of 'Letters Pat-ent.

.latented dune 3, idiot aerial fue. 124,605.

such a manner as 'to eiiciently utilize the heat which remains in the core bars at the end ot each mold i'orniing operation7 in drying and baking the skilly coats, and in dry4A ing and baking the loam coats appliedto the core bars to tit them tor subsequentnse.

The accomplishment of this enables me to ,30

minimize the time and fuel required to fit the core bars for use with the skilly and loam coats properly dried and baked in place.

The gist of my invention is the provision e5 oi apparatus whereby the application to the core bars innnediately aiter being drawn from the molds followingl the pouring of the latter, oi2 a coating ot skilly which is sprayed on in such a manner as to secure y0 the desired uniformity oi' coating; and the desired quick dryingand baking of the skilly coating. By proceeding in this manner only a relatively small amount of the heat of the core bar is Wasted duringthe 'J5 skilly application owing to the rapidity of the application and the insulating property ot the skill)Y layer, and the :fact that practically every particle of slrilly iinpingingI against the core bars adheres to the latter. In consequence, the heat of the core bars not utilized in'drying. and baking the slrilly coatings is conserved and may be utilized in drying and baking the loam coating or coatings applied to thel core bars as soon as the slrilly coatings on the latter are thoroughly vdried and bellied.

The various features of novelty which characterize my invention are pointed out with particular-ity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, however, and the advantages possessed by it reference should be had to 'the accompanying drawings and descriptive e5 shown. and are deposited on one scale than Fig. l, and showing a portion only of the apparatus shown in the last nientioned ligure;

Fig. 3 is an end elevation ratus shown in Fig. 2; f

l41 ig. l is a partial elevationtaken similarly to Fig. 3, but on a larger scale and showing' a portion only of the apparatus shown in Fig. 3;

Fig. 5 is a partial. elevation taken at right angles to Fig. 4 and showing a portion of the apparatus shown in Fie'. '2; f

Fig. 6 is an elevation of one of the core lowering bars;

Fig'. 7 is an elevation of the appataken at right angles to Fie'. 3 et a portion of the apparatus shown in 2;

Fig. 8 is a somewhat diagrammatic representation of the slcilly mixing and spraying apparatus proper; and

Fig'. l.) is an elevation of a portion of the spray nozzle.

In the drawings 'I have illustrated the use of' my invention in, and in connection with a pipe 'founding plant in which pipes are formed in vertical pipe molds A shown as arranged in circular series mounted on a turn table or other suitable support.

A\ssociated with the mold supports are two sets ot instrumentalities each eoniprising a core bar receiving' table B; a .core bar rotating device C; storing provisions D for the skilly coated core hars; a loam applying lathe or striker E and core ears F running on tracks G into heating ovens Il.

In operation 'the core bars L are drawn from the molds A within a 'few minutes after the molds have been poured ordinarily by suitablev overhead crane mechanism not or the other of the tables l. ln practice, and with the Darts proportioned as indicated in the'drawings7 the core bars may advantageously bey drawn from the molds in sets of twelve each, though ilA is to be understood that the twelve core bars ot' each set, need not be simultaneously drawn troni the molds. The core bars ot each set are deposited on one ot the tables l. successive. sets ot core bars being' deposited alternately on the two tables ll. From each tablel 'l` a set of core bars deposited thereon at one time are run 0H on to the adjacent core bar rotating' machine C. The latter as shown is formed in two sections t" and (lu which are duplicates of one another except in one respect hereinafter reierred to. Each of the sections tl and C2 comprises a pair ot parallel end supports C and (f4. lilach end support C is provided with bearings tor a plurality of short pai'- allel shafts Cf'. Each of' the shafts C carries at one end a roll C which may well be knurled. and at the other en d a gear wheel ("Y in mesh with a, worm shaft (`M which e..\'-,

tends lengthwise oil. the support C" and ,of the shafts C and C11.

meshes with all of the gear wheels C7 mount ed therein. C C9 represent cranks by means el which and the shafts C* the various 'rolls C are rotated. Each support C* has journaled on it a plurality ofrrolls Cl which are co-axial each with a corresponding one of the rolls C5 and are ot the saine diameter as the latter roll. As shown, each roll Cl" is journaled on a stationary shaft C11 secured in the support C4. The rolls C and C are spaced such a distance apart that the group et' core bars L supported thereby willfbe spaced apart from one another as shown best in Figs. 2 and Jourualed in the supports C and C* of each section C2 are a pair ot` short shafts J which are parallel to, and below the level The suppe"ts C and C* of the section C each have journaled in them one short shaft J and are each provided with bearings tor a single long shatt J`2 which is thus journaled in the. two cud supports. Secured to each ot' the shafts J is a corresponding arm J and similar arms J are secured to the shaft J2 adjacent. the supports C and C4. Each of the arms J has its free end pivotally connected to a bifurcated arm I depending' from a bar which extends transversely to the shafts J' and J2. There are two of the bars l, one lying alongside and approximately equal in length to the combined length ot the two supports C, and the other of thesame length and lying' alongside of two supports ("2 llach bar l lies alongside the. correspending' rolls (f5 or Cl" and is adjustable between a core bar receiving position in which its upper edge is above the level of the upper edges of the rolls (l5 and 0", and a second position in which its upper edge is below the lower edges of core bars resting' on the rolls C5 and Cl". rl`he bars l are raised and lowered b v rotating' the long sha'lt J2. The latter is extended beyond the support C and provided with a crank arm J in in which is swiveled a' nut J receiving a threaded shaft J which is swiveled in a support J in which the shaft J is journaled. The screw shat't J5 is rotated by means` inclndinpA a crank .V and the hars l correspondingly raised and lowered.

ln placing` core bars on the. core har .rotating device (l, the bars l are raised above the level ol the upper sides ot the rolls tf and C", after which the core bars are rolled on to the bars l trom the table ll. After the core'l ars arey thus mounted on the rolls or bars l and are properl)v spaced thereon` the bars l are lowered b v manipulatingY the, crank J'I to let the core bars down into engagement with the corresponding rollers t and Cl". ln this condition ot the. apparatus the core bars mounted on each ol the sections C and (lli mav be simultaneously rotated by revolving the correspondinfjr crank C".

CVI

lVith the core bars mounted `on,th'ecore rotating devices C as described, the slrilly is applied to the core bars in. the "iforniot' a spray, being sprayed in succession ondili'er ent portions of the surface of the bars being coated, and vthe sprayed sectionsbeing given an opportunity to dry sutliciently to set the slilly before the bars are rotated and other sections thereoi sprayed. CU represents a removable board or plate mounted in each core bar rotating device C to prevent any portion of the slrilly spray directed against the core bars mounted in oise of the sections C and C2v from falling on bars mounted in the other of said sections.

The slriil y spraying apparatus in `the forni illustrated comprises a skillyinixing` reservoir M which may advantageously9 as shown, be located below the door level and is in the forni ot a horizontal tank containing a rotating mixer or stirring device M driven by suitable means as a motor M1". M2 represents a filling connection provided with a. removable cap M3 located above the floor level. Mt represents a. valved vent pipe connected to the upper sideor the rwervoir M, and N represents a pressure reducingl valve through which compressed air is supplied to the reservoir M from a compressed air supply pipe N when the latter is in operationT M5 and M represent delivery pipes running from the lower portion oi the reservoir Ml to points adjacent the two devices C where, as shown, they are provided with cutv -off valves M7 and are each adapted to he connected to a hose or flexible sprayspipe l).

,"The air supply pipe has extension N2 and N3 terminating acent the valved ends of the pipes MS and M6 and provided with cut oli valves N4 and adapted yto vbe' connected thereby.; each to a. flexible pipe or'hose which with the corresponding hose or pipe U runs to the spraying device Q proper. The latter. in the form shown., comprises a chambered body which, as shown, comprises two tubo lar sections connected by a chamber Q2'- of larger cross section. To the outer end ot one ot' the tubular sections the hose pipe U is connected, and the outer end or the other tubular section terminates in the discharge nozzle Q. lx'referably as shown, the nozzle G is formed by flattening the end. ot the corresponding tubular section'of the body, and advantageously, also, by giving it the concave end edge shown. l l have found that a spray nozzle formed in this manner etlec tively delivers a uniform and concentrated spray jet; that is, one in which the opposite sides oi' the fan like discharge malte a coniparatively small angle-with one another as oliows: In the chamber Q2 is located an air jet nozzle @a to which the air supply hose is connected. The nozzle Qt discharges an axial jet directly toward .the spray nozzle outlet Q3. G and l? are regulating valves i through `which the rossore 'pipes' and l respectively aro'cr'innected to the body hi is a cut'fod valve in the compressed V supply pipe lil. A prefer 1ed general inode of using the apparatus disclosed consists in drawing; coro bars from the previously poured molds prac-- ticall' as soon after pouringl as is possibleS and depositing the core bars in sets orl a dozen each alternately on the tivo receivinga tables l5. From each receiving tahlmc ll the set or' core bars deposited thereon are rolled on to the correspoi'idin@y core ha r rotating device tl. At the time thefbars are rolled on to the rotating device C the rails l are in their elevated position and the boarlh` or dividing plate. Cif", is removed. The core bars which are run on to the rails il are so disposed on the latter, either initially or as they are lowered, that when the rails l are fully lowered, each core bar 'will be supported at one end by tivo rolls C5 and at the other end by the corresponding pair of rolls (im. 'fhe rails l olf each device are. lowered by inanipdlating the corresponding crank vll. After the core hars are thus dropped on the supporting rolls and C10, the partition plate C15 is put back into place and the core bars are then sprayed with the slrilly by a workman who holds the sprayer Q and directs the spray 'jet in the proper direction. The spraying operation is carried out in succes sive sections or Qin the irst stage olE the spraying operation, the upper sides oi' the group ot core bars inonnted on one section? as for instance, section C oi one of the core bar rotating devices., are sprayed, and then the upper sides or' the l@group ot core barson the other sections (C2) of the saine core bar rotating device are sprayed. Then the. core bars oit the group first acted on are given a partial turn by the manipulation oi the corresponding crank C97 after which the then uppermost sides of the core bars of this group are sprayed with skiliy. This stage is followed by a corresponding rotation or' the i bars ot the other group and the sprayingq ot their then uppermost sides, and so on until both groups oi core bars are completely coated with? slrilly.

l have found that by thus dividingy the spraying operations to `which eac-h group of core bars is subjected, into a suitable number or stagesj it is possible to coat the bars with sli'illy in a very uniform and satis'i'acn L skill y. Ordinarily I prefertospray each group of core bars in three stages giving the bars a third of a turn between successive spraying operations. By proceeding in the manner described, and allowing a suiiicient time interval which will be approximately equal to that required for performing one sprayingr operation on another group of core bars to elapse between the successive stages otl the operation ot' spraying a` single group ot core hars7 no diiticulty will ordinarily be experienced yfrom the skilly running on the partially coated bars when the latter are given the partial turn needed to put them in position tor a succeeding spraying operation. Ordinarily a single coating ot' skilly applied in the manner described is sutiicient as with the means and mode ot' `operation described a single coating ot three-eighths of an inch or so in thickness can readily be applied. 1tis readily possible.however, to apply two or more coats oit skilly in successive spraying stages when this seems necessary or desirable.

After the spray ing operation foreach group ot' core bars is completed and sutticient time has elapsed for the skilly last, applied to set, the core, bars are passed to the storage stack D. As shown7 the core bars are here arranged in superimposed tiers the core bars in each tier being mountedin a corresponding set of notched bars receiving the uncoated ends of the core bars supported thereby and resting on the uncoated portions ofthe subjacent. core bars. F rom the stack D the ore bars are taken one at a time to the core lathe E and given the first coating ot loam at'ter which they are placed on core cars F and pushed into the drying ovens ll. After the first coat on each core bar is dried. the core bar is returned to the lathe and given a second coat ot loam and is then coated with blacking at'ter which the, bar is putI back ou the core, car and again pushed into the oven to complete the drying., aitter which the core bar is ready to be again inserted in the mold.

By proceeding in accordance with the present invention it is possible to'coat the core bars while they are still hot enough to quickly and thoroughly dry the skilly, this 'operation requiring a temlwrature ot about 400 l4`. 1n the normal operation ot a continuously operating plant mold, the core hars which are insulated to some extent against heat radiation by the skilly coatings will pass through the storage stack and core lathe ll while still hot enough so that the drying of the irst loam coat will be materially `aided by the heat still retained in the. core. bar. rlhe heat retained in the core bars when the. latter with the skilly and first loam coats are put into the drying ovens ll reduces the amount ot' heat which it is necessary tor the core bars to absorb 'from the.

- in the form ot' the apparatus ovens and consequently reduces the time and fuel required for the loam dryingoperation.

Vhile in accordance with they provisions of the statutes 1 have illustrated and denow known to me, it will be obvious to those skilled 1n the art that changes may be made in the mode of p actising the invention described, without departing from the spirit ot' the invention. It will also be apparent to those skilled in the art that some features of the invention may sometimes be used with advantage without a corresponding use of other features;

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is

1. Apparatus for coating core bars with skilly comprising in combination means for supporting two groups of parallel closely spaced horizontally disposed core. bars, and means for intermittently rotating each group imlependently of the other.

2. Apparatus t'or coating core bars with skilly comprising in combination means for supporting two groups ot parallel closely spaced horizontally disposed corey bars, means tor intermittently rotating each group independently of the other, and means for discharging skilly in the form ot a spray on the exposed upper sides of the core bars.

Apparatus tor coating core bars with skilly comprising in combination a core bar support provided with means tor supporting a plurality ot closely spaced core bars, means for intermittently imparting a partial rotation to the various bars mounted on said support and skilly spraying apparat-us comprising a skilly reservoir, means for agitating the contents thereof. and. a pneumatic sprayer t'or withdrawing skilly from said resev ir and discharging it in a spray on the exposed upper sides et" the core bars.

4. ("ore bar supporting and rotating means comprising iu combination two sets ot' devices tor rotatably supporting the opposite ends ot cole bars arranged sido. by side, and means located between said sets et' devices and movable troni one position in which they are adapted to support said core bars and hold them out ol engagement with said devices into another position in `which they permit the core barsI to be engaged`aud supported by said devices.

5. core bar supporting and rotating mechanism comprising in combination two spaced apart sets ot rollers i'or .rotatably supporting the opposite ends ot' a group ot' parallel core bars` and guide railsl extending transversely to the axes ot said roa'lers and lying between the two sets ot ro lers and movable from one position inwhich their upper edge-s are above the upper sides of scribed the best embodimentof my invention disclosed and said rollers into another position in which they clear tlu`l under .sides of core bars supported by said rollers.

(3. A core har supporting' and rotating device comprising in combination means` for supportingV a pluralit)1 of parallel core bars arranged side by side in two closely spaced groups, means for intermittently rotating the bars in each group independently of the other group and a removable barrier for preventing a spray jet of skilly directed against one group from impinging against the other group.

WILLIAM STROBRIDGE. 

